feat(skills): add knolo-kb built-in skill

[The3seus]

Summary

Adds a new built-in DeerFlow skill: knolo-kb.

This skill is intended to make Knolo easier to use inside the repo by giving the assistant a focused, reusable workflow for @knolo/core tasks. The skill is now narrowed to the current supported package and avoids broader package guidance that was causing noisy or misleading test results.

What this adds

• new built-in skill under skills/public/knolo-kb/

• focused guidance for working with @knolo/core

• unpinned install commands that use the latest version by default

• migration guidance away from deprecated knolo-core

• practical workflows for:

  • installing @knolo/core
  • building .knolo packs
  • mounting packs in Node
  • runtime-safe mounting from bytes / URL
  • lexical-first querying
  • optional semantic reranking

Why

The goal is to ship a default Knolo skill with DeerFlow so users can call it directly when they need help with Knolo pack creation, mounting, querying, or migration.

The skill was revised to focus only on @knolo/core so that:

• the scope matches the currently tested and supported package
• install guidance stays accurate
• the skill is easier to trigger and more reliable in practice
• tests validate the real supported Knolo workflow instead of extra package assumptions

Testing

Tested locally in the DeerFlow dev environment.

Validated that:

• the skill loads correctly from the built-in skills directory
• the skill guidance uses @knolo/core
• the skill does not invent or pin version numbers
• the skill warns about deprecated knolo-core
• the skill provides working guidance for .knolo build and mount flows
• the revised skill passes the current Knolo-focused validation flow

Notes

This change adds a built-in skill only. It does not introduce application code changes outside the shipped skill contents.

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